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Thanks, Hans.? The tinySA has been on my list for a while.? Now I have a good reason to get one! Eric

The SWR metering and protection are features that really make the QMX a field capable radio. However, from several outings now I’m finding that I would like a front panel means to activate a reduced

Volker, Remove the BS170s. Test for 5 volts at the gate pads when in transmit. 0 volts receive. If good replace BS170s. Maybe consider a diode across L14, could protect against one failure mode. 73

Hi Eric I don't think 'scope FFTs are anywhere near good enough for HF transmitter harmonic testing, and get worse as the frequency goes up. The job needs a real spectrum analyzer. The TinySA is very

High-band QMX rev2 (2024), 9V version, Firmware 017.? Having fun learning about this radio. LPF cutoffs are good, though LPFs 1 and 2 show stopbands a little high, about –30dB.? I get 4W out on

Correct! In my case I smoked out two of the BS170 and ended up with one heathy BS170. QDX is ?still alive and kicking with that one!:) 3x BS170 is absolutely a better option to distribute output

Ah, yes. more data. This happened on 40m, 7074 KHz. I was transmitting sucessfully right before, couple of POTA QSOs, tuned antenna to SWR 1,2:1 (with NanoVNA) 73 de EA7KLK Volker

Hello, 'fraid my QDX let out the magic smoke today. I had one of these rare moments when it would not transmit after changing band / frequency. I unplugged from both PC and power, plugged pwer back

Hello, I am offering my fully built low band Rev1 QMX for sale. I am a J-STD soldering instructor and experienced kit builder. My QMX worked fine first time with no issues. I am very happy with the

Just to make sure I understand the theory...? 3x BS-170's @ 5v would still result in the same QRPp power out as Barb's 1x BS-170 @ 5v? Thanks Jon n0wl

Hi Donald.? Quite true about the voltage acquisition timing issues.? One solution is to get the voltage before the limiting resistor for the LED.? Then just buffer (if necessary) and low pass the

Awesome, glad to hear this. How are you finding wsjtx on the Quadra? I got it working before (though with a different radio) but to me it seemed it was barely able to keep up with the decodes and

Thanks, but now the PC no longer opens the Progrock programming page, probably because the pic has broken down and is therefore no longer usable. 73 iw2gg Enrico [email protected]> ha

Watch the update rate on the meter, as well as the ability to disable the auto range.? With a flashing/pulsing LED the auto ranging might get stuck trying to chase the varying signal. I have seen

Sorry to hear that it’s dead. No consolation, but it could be worse. I saw an ad a few weeks ago here in UK, for a week old Yaesu FTDX10 that the owner had given 55 Volts… Spares or repairs!

Thanks for the help everyone. It was a fun build so when budget loosens up a bit I'll give it another go. Maybe by then the QMS will be out. 73 all

She lives! It was plain, old, uncomplicated, simple RFI. Clipped two ferrite beads onto the coax, and another two onto the USB cable, et voila, JS8 and WSJT-X work just fine. Thank you to everyone who

Would Q204 be as sensitive to ESD? Being connected to an external jack (PTT) isn't it sort of hanging out there like an antenna? -- Tisha, AA4HA

Thinking about this some more, a Trinket M0 could monitor the voltage of the LED with a GPIO and output it while emulating a USB keyboard. I use trinkets as keyboards all the time. I have a rotary

Hi Brad. I'm by no means an expert in this, but If you're reading single digits of resistance across the 2 rails on the main board to ground with the smps boards removed, then yes, your QMX has